Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks	$ 128,517	$ 99,673
Short-term interest bearing accounts	864	69,119
Securities available for sale, at fair value	1,244,619	1,129,368
Securities held to maturity (fair value $72,198 and $98,759)	70,811	97,310
Trading securities	3,062	2,808
Federal Reserve and Federal Home Loan Bank stock	27,020	27,246
Loans and leases	3,800,203	3,610,006
Less allowance for loan and lease losses	71,334	71,234
Net loans and leases	3,728,869	3,538,772
Premises and equipment, net	74,541	67,404
Goodwill	132,029	114,841
Intangible assets, net	18,194	17,543
Bank owned life insurance	77,626	75,301
Other assets	92,254	99,471
Total assets	5,598,406	5,338,856
Liabilities
Demand (noninterest bearing)	1,052,906	911,741
Savings, NOW, and money market	2,381,116	2,291,833
Time	933,127	930,778
Total deposits	4,367,149	4,134,352
Short-term borrowings	181,592	159,434
Long-term debt	370,344	369,874
Trust preferred debentures	75,422	75,422
Other liabilities	65,789	66,202
Total liabilities	5,060,296	4,805,284
Stockholders' equity
Preferred stock, $0.01 par value; authorized 2,500,000 shares at December 31, 2011 and 2010	0	0
Common stock, $0.01 par value. Authorized 50,000,000 shares at December 31, 2011 and 2010; issued 38,035,539 at December 31, 2011 and 2010	380	380
Additional paid-in-capital	317,329	314,023
Retained earnings	329,981	299,797
Accumulated other comprehensive loss	(6,104)	(5,335)
Common stock in treasury, at cost, 4,878,829 and 3,532,732 shares at December 31, 2011 and 2010, respectively	(103,476)	(75,293)
Total stockholders' equity	538,110	533,572
Total liabilities and stockholders' equity	$ 5,598,406	$ 5,338,856